Device for monitoring voltage leads and method of using same
US6570130B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2002 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Jan 25, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/0953
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A device for terminating operation of the power source of an electric arc welder for passing a current between an electrode and work piece from a first stud connected to the electrode by a first cable and a second stud connected to the work piece by a second cable to perform a welding process. The welder includes an output transformer with a known turns ratio, a primary winding and secondary winding. A first voltage sense lead is connected to the electrode and a second voltage sense lead connected to the work piece. The novel device comprises an executive program to implement a test sequence involving (a) a program routine for comparing a real time theoretical voltage, determined by the pulse waveform at a given time of the waveform, and the voltage at the sense leads at the given time; (b) a program routine to terminate operation of the power source when the theoretical voltage substantially exceeds the sense lead voltage; and, (c) a timing routine to perform the executive program at a set period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.